Power of a power is the law<span />
2^3=2*2*2
2*2*2+4*8
8+32
=> 40
C: 7(-n) - 3 = n + 4
hope it helps!
Answer:
y = - 9, y = 3
Step-by-step explanation:
Calculate distance d using the distance formula
d = 
with (x₁, y₁ ) = (2, - 3) and (x₂, y₂ ) = (10, y)
d = 
= 
Given distance between points is 10, then
= 10 ( square both sides )
64 + (y + 3)² = 100 ( subtract 64 from both sides )
(y + 3)² = 36 ( take the square root of both sides )
y + 3 = ±
= ± 6 ( subtract 3 from both sides )
y = - 3 ± 6 , thus
y = - 3 - 6 = - 9
y = - 3 + 6 = 3
We know that 7 cookies at the current price (75 cents less than normal) will cost $2.80.
Thus, we can set up the equation 7(c - .75) = 2.80
Now, let's solve for c.
c - .75 = .4
Add .75 to get:
c = 1.15